Updates to lang, and establish lang-advisors

This adds the lang advisors team as established by
rust-lang/rfcs#3327 . All of the individual
people this commits adds have been approved by the entire lang team, and
all have confirmed that they want to be added. Welcome to @alexcrichton,
@Amanieu, @jackh726, @JakobDegen, @RalfJung, @simulacrum, and
@wesleywiser! Welcome as well to @cramertj who is moving from lang to
lang-advisors, and thank you for all you've done for the lang team!

This also adds Tyler Mandry (@tmandry) to the lang team. Welcome to the
team, Tyler!

We plan to make an Inside Rust blog post soon.

Author: joshtriplett

teams/lang-advisors.toml

@@ -0,0 +1,30 @@
+name = "lang-advisors"
+subteam-of = "lang"
+
+[people]
+members = [
+    "alexcrichton",
+    "Amanieu",
+    "cramertj",
+    "jackh726",
+    "JakobDegen",
+    "RalfJung",
+    "simulacrum",
+    "wesleywiser",
+]
+
+# Granting these permissions because an advisor can use these to help when
+# reviewing a proposed change.
+[permissions]
+perf = true
+crater = true
+
+[[github]]
+orgs = ["rust-lang"]
+
+[website]
+name = "Language Advisors team"
+description = "Advising on the development of the Rust language"
+
+[[zulip-groups]]
+name = "T-lang-advisors"

teams/lang.toml

@@ -3,14 +3,15 @@ name = "lang"
 [people]
 leads = ["nikomatsakis", "joshtriplett"]
 members = [
-    "cramertj",
     "joshtriplett",
     "nikomatsakis",
     "pnkfelix",
     "scottmcm",
+    "tmandry",
 ]
 alumni = [
     "Centril",
+    "cramertj",
     "nrc",
     "withoutboats",
 ]